Has an Olympic Baseball game ever ended 13-9?
Exactly once. On January 1, 1996, Cuba beat Japan 13-9, and no Olympic Baseball game before or since has ended that way. When it happened it was a scorigami, the first 13-9 in league history.
That makes 13-9 the 48th most common final score out of 87 that have ever occurred in Olympic Baseball. One point away, 14-9 has happened never and 13-10 has happened never.